是否有可能为nhibernate返回一个查询作为一个IDictionary而不是一个实体类？ [英] Is it possible for nhibernate to return a query as an IDictionary instead of an entity class?

问题描述

我有一个实体Person：

  public class Person 
 {
 public virtual int Id {得到;组; } 
公共虚拟字符串名字{get;组; } 
公共虚拟字符串MiddleName {get;组; } 
 public virtual string LastName {get;组; } 
 
 $ / code $ / pre 
 
 
映射：
 
 
  public class PersonMap 
 {
 public PersonMap（）
 {
 Table（TABLE_NAME）; 
 Id（x => x.Id）; 
 Map（x => x.FirstName）.Not.Nullable（）; 
 Map（x => x.LastName）.Not.Nullable（）; 
 Map（x => x.MiddleName）.Not.Nullable（）; 
 
 
 
 
 $ b $ p 
 $有一些stui我希望Nhibernate返回字典，而不是实体：
 
 
  IDictionary< string，string> person = session.Get（id）; // ???? 
字符串firstName = person [FirstName]; 
  
这可能不需要添加不同的映射吗？
 
解决方案
您将需要定义您自己的ResultTransformer实现，使其以您需要的方式工作。以下是您可以根据需要调整的参考实现。完全没有错误检查等;所以请谨慎使用;）
  using System; 
使用System.Collections; 
使用NHibernate; 
使用NHibernate.Properties; 
使用NHibernate.Transform; 
 
 
 
 public class DictionaryResultTransformer：IResultTransformer 
 {
 
 Dictionary DictionaryResultTransformer（）
 {
 
} 
 
 #region IResultTransformer成员
 $ b $公共IList TransformList（IList集合）
 {
 return collection; 
 
 
 public object TransformTuple（object [] tuple，string [] aliases）
 {
 var result = new Dictionary< string，object>（）; 
 for（int i = 0; i< aliases.Length; i ++）
 {
 result [aliases [i]] = tuple [i]; 
} 
返回结果; 
} 
 
 #endregion 
} 
  
 
I have an entity Person:
public class Person
{
   public virtual int Id {get; set; }
   public virtual string FirstName { get; set; }
   public virtual string MiddleName { get; set; }
   public virtual string LastName { get; set; }
}
with the mappings: 
public class PersonMap
{
   public PersonMap()
   {
       Table(TABLE_NAME); 
       Id( x => x.Id);
       Map(x => x.FirstName).Not.Nullable();
       Map(x => x.LastName).Not.Nullable();
       Map(x => x.MiddleName).Not.Nullable();
    }
}
There are some stuations where I would like Nhibernate to return a dictionary instead of the entity:
IDictionary<string,string> person = session.Get(id);//????
string firstName = person["FirstName"];
Is this possible to without adding a different mapping?
解决方案
You will need to define your own ResultTransformer implementation to have this working the way you need it. Below is a reference implementation that you can tweak as needed. There is a complete lack of error-checking, etc; so use with caution ;)
using System;
using System.Collections;
using NHibernate;
using NHibernate.Properties;
using NHibernate.Transform;


[Serializable]
public class DictionaryResultTransformer : IResultTransformer
{

        public DictionaryResultTransformer()
        {

        }

        #region IResultTransformer Members

        public IList TransformList(IList collection)
        {
                return collection;
        }

        public object TransformTuple(object[] tuple, string[] aliases)
        {
          var result = new Dictionary<string,object>();
          for (int i = 0; i < aliases.Length; i++)
          {
            result[aliases[i]] = tuple[i];                         
          }
          return result;
        }

        #endregion
}


                        
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